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Diesel Engine Vs. Gasoline Engine (4 reasons for a diesel specific repair shop)

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Diesel Engine Vs. Gasoline Engine

What’s the Difference Between a Diesel Engine & Gasoline Engine?

Although pretty similar, diesel engines and gasoline engines differ in a few notable ways. The primary purpose of an engine is to convert chemical energy in fuel to mechanical energy. This energy signals pistons to move inside the cylinders; these pistons are connected to a crankshaft which respond to the up and down movement of the pistons.
Voila- this movement (that we call a linear motion) creates a rotary motion that gets those wheels rolling forward. The difference in a diesel engine lies in the way fuel is converted to energy, by a series of small explosions or combustions. With diesel engines, the air is compressed first before fuel is injected- whereas within a gasoline engine, fuel is first mixed with air, compressed by pistons and ignited by sparks from spark plugs. Diesel engines don’t use spark plugs to ignite the fuel, because:
Compressed air – hot air- fuel ignition. Simple as. What might sound like a small difference in mechanics truly isn’t. The specifics of diesel engines require additional training and certification to properly maintain them. As an example, diesel engines tend to produce more soot and acidic combustion, commonly known as “blow-by.”
Diesel engines are found within bigger vehicles, particularly within the transportation industry- buses, tractors etc.

Your Diesel Engine Really Does Need A Diesel Specific Repair Shop)

We’re not denying that a lot of regular auto shops would be able to work on your diesel vehicle. However, the difference between a gasoline and diesel engine do make specialty engine care somewhat of a must- particularly with commercial fleet vehicles and specialty makes and models.

4 More Reasons You Need Diesel Specific Repair


– Since the engines are so different, mechanics require a different form of training for diesel vehicles. Diesel engines are mechanically focused while gasoline engines are technically focused. Honing in a mechanics training to work with specific engines is key, hence the need for focused training for diesel engines alone. Mechanics can work on both- for sure – but specialty service and training means the difference between adequate and superior maintenance of your diesel vehicle.


Diesel vehicles require different levels and areas of maintenance. Diesel vehicles, in some areas, require higher levels of maintenance than gasoline engines. Increased horsepower, torque, emission standards and technology require more consistent maintenance of diesel vehicles and trucks- with diesel specific products. Filters, specific diesel engine oil, exhaust fluids, brake fluids etc. are all specific to diesel vehicles and trucks. Not only will your technician need to understand the specifics of these products and work with them regularly, they will also need to understand the particularly (and different) maintenance schedule for diesel vehicles to keep your ride running on track.


– Access to parts. A one stop shop for all vehicles may suit some auto needs, but when it comes to the optimal maintenance of your diesel vehicle, you need techs with the hookups to the best selection of diesel parts and accessories out there. Quickly, as well – a diesel repair shops relationship with specific suppliers will come in handy when you just don’t feel like waiting months for a part.


– Though seemingly a little obvious, diesel repair shops are full equipped to service commercial vehicles of all sizes, duties and engine capacities. Some autobody shops may be able to assist in lighter commercial vehicles, but diesel shops have the full capacity to service your entire fleet.

Pick a Diesel Repair Shop With More

Along side regular maintenance for your diesel vehicle, your repair shop should really offer a full line of services suited to your vehicles needs.
Your diesel repair shop should offer services from beginning to end- parts, maintenance, custom fabrication and OEM & aftermarket product needs.
(We’re not just saying that because we do- but, we do.)
More often than we would like, we see new clients come through with rides that have been worked on by local auto body shops not entirely equipped for diesel vehicle maintenance. It typically isn’t lie threatening to the vehicle, but we routinely see areas in which more specific care could have been applied and extended the life of diesel engines.
*PSA*- because diesel engines tend to collect more soot, regular oil changes are a must. While you should never really go without regular oil changes, gasoline vehicles can withstand a little longer of a waiting period. Diesel vehicles really need regular oil changes to keep the oil clean- and this is 100% part of a specific maintenance plan that your diesel technician can help you follow.